Data Communication or Network Communication: It is the process of transporting data or information from one device to another.The channel or physical connection (path) through which the information is carried from sender(Source or origin) to the receiver(destination) is established using either cable (Physical media) or wireless media. The physical cable like twisted pair wire, coaxial cable, fiber-optic cable or wireless media like laser, radio waves, and microwaves. [Read more…] about What is the difference between computer networks and network communications?

Many of today’s devices rely heavily on access to your office network and the Internet. In this tutorial, we’ll show you how to connect devices to the company network. [Read more…] about How to Networking Your Devices

Setting up and securing a wireless router in your office is something anyone can do. Here, we’ll take you step-by-step through the physical installation and setup of a wireless router. [Read more…] about How to Set Up a Wireless Router Installation & Configuration

Internet access has become a standard feature on most of our mobile devices. But there’s more than one way to connect to the Web with those devices these days. In this article, we’ll help you determine what you need in order to get started with each of these technologies and explain a bit about why you would want to choose one over the other or perhaps go with both. [Read more…] about What is the difference between Wi-Fi vs. Mobile Broadband

WiMAX (Worldwide Interoperability for Microwave Access) is the result of an initiative launched in 2001 by the WiMAX Alliance. Its aim was to promote the IEEE 802.16 standard by proposing to verify compliance and equipment interoperability. As we shall see, many options have been proposed to achieve communication. [Read more…] about What is WiMAX (Worldwide Interoperability for Microwave Access)?

The quality of service is essential to ensure the transfer of real time data such as voice or video. Such services require isochronous transfers, that is to say data transfers that enable to vary the time between the different frames of the same transmission. In the case of a video application, for example, over this period, the greater the quality deteriorates, whether audible or visual. To minimize this delay, priority mechanisms were introduced by an extension to the 802.11 standard, called 802.11e. [Read more…] about What is IEEE 802.11e?

With pre-IEEE 802.11n products, the maximum speed reached in late 2007 is 108 Mbit / s, that is to say double the IEEE 802.11a and 802.11g standards. This flow rate is achieved by increasing the density of transmitted bits. Technological advances are such in the field of radio transmission it is now possible to improve greatly this flow. 802.11n networks offer a potential gross rate of 540 Mbit / s. In fact, the actual flow rate is much lower and is of the order of 100 Mbit/s in the best case. [Read more…] about What is IEEE 802.11n?

The IEEE 802.15 group was set up in March 1999 to reflect on wireless networks with a range of ten meters, or WPAN (Wireless Personal Area Network), with the aim of making connections between different portable one user or multiple users. This type of network can connect a laptop, cell phone, PDA or any other device of this type. Three service groups were defined, A, B and C. [Read more…] about What is 802.15 (WPAN) ?

Ethernet networks at 10 Mbit/s were the first to be introduced in the market. They still represent a significant proportion, although standards to 100 Mbit/s tend to supplant them. This section reviews the various products of the Ethernet shared working at a speed of 10 Mbit/s. [Read more…] about Ethernet networks at 10 Mbit/s

Another solution to obtain a broadband distribution network is to use the wiring of cable operators, when it exists. This wiring has long been made of CATV (cable TV), whose bandwidth exceeds 800MHz easily. Today, this infrastructure is slightly modified by the introduction of systems HFC (Hybrid Fiber/Coax), combining a fiber portion between the head end and the beginning of the service by the CATV. This topology is illustrated in Figure. [Read more…] about Cable networks (CATV)

When the frames transmitted on the PON are Ethernet, EPON talking. The features of this network are identical to those of the other PON: distribution throughout the network, where only the station specified in the Ethernet frame can retrieve the information conveyed. The standardization of EPON technology is performed by the IEEE 802.3ah group. This group has several objectives, including that of introducing Ethernet in the local loop under the name of EFM (Ethernet in the First Mile). The objective was to replace the ATM technology, very expensive to implement on a multipoint technology, the Ethernet technology. [Read more…] about Ethernet Passive Optical Network (EPON)

On the Passive Optical Network (PON), it is possible to transit ATM cells according to the technique developed by the working group FSAN (Full Service Access Network). This solution was then standardized in G.983 recommendation ITU-T. Both ends of the optical shaft are called OLT (Optical Line Termination) and ONU (optical network unit). For reasons of energy loss, it is not possible to exceed fifty branches on the trunk. The figure illustrates the architecture of a passive optical network. [Read more…] about Passive Optical Network

The function of the network layer is to provide an end-to-end communication capability to the transport layer, which lies above it as shown in Figure. The OSI reference model specifies that the transport layer need not know the method by which the network layer performs communications. [Read more…] about What is the Network Layer? – Definition

The Ethernet frame is designed to transport packets in enterprise networks by an original method for broadcasting on a local network. This solution gave birth shared Ethernet, in which the broadcast frame is transmitted and where only the station that recognizes the right to copy the information. To this solution dissemination has added Ethernet switching. [Read more…] about What is Ethernet Frame?

How to encode the digital signal is an important function of coupler communication. This main function is to adapt the signals transmission channel. In the case of local networks, the transmission rate is tens or hundreds of megabits per second. Therefore, the choice of representation Physical data is important. To perform the synchronization bit, that is to say, to ensure that each bit is read at the right time, you need a minimum of transitions are made to extract the clock signal. [Read more…] about The Digitization of Signals

Before transmitting information on a transmission medium, it must be encoded of adequately. Networks must allow very high speeds over distances more or shorter. In this context, three approaches are possible for coding bits from applications: [Read more…] about what is network transmission?

ISO (International Standardization Organization) standard has its own architecture as the OSI (Open Systems Interconnection). The architecture ISO is the first to be defined, and so relatively parallel to the Internet. The distinction between the two is that the ISO formally defines the different layers architecture, while the Internet architecture is applied to achieve a practical environment. [Read more…] about ISO Architecture

The MAC layer is the “Brain” of WiFi. The first version of 802.11 (the 802.11 legacy published in 1997), defined the MAC layer by incorporating a number of features crucial, such as sharing of speech among users, the terms of network connection, error control or security. [Read more…] about Functions of the MAC Layer

Short communication

The infrared light is used for many years for the communication directly between nearby devices to each other, such as remote control and your television, for example. [Read more…] about Infrared and Laser Transmission

The extension of the corporate network

Although there are a multitude of applications in WiFi technology, it is clear as its primary target is the corporate network. As we have seen, the WiFi was designed for a wireless version of Ethernet and the latter is found in almost all businesses. In most cases, a company that decides be equipped with a WiFi network already has a wired Ethernet network. It is therefore generally build a wireless extension to an existing wired network. [Read more…] about Applications of Wifi

Parity is a form of “error checking” where the computer checks to see if all the data it was supposed to get really did come through. You will most likely be confronted with parity when you use a telecommunications package to communicate through your modem. In fact, that’s probably why you’re reading this. The dialog box where you can set the serial port settings always wants to know the parity. The default setting is probably the safest thing to use if you don’t know a reason to change it. [Read more…] about What is Parity bit?

Half duplex means data can be relayed in only one direction at a time. Two-way transmission is possible, but the transmissions must be alternate. A walkie-talkie is half duplex-when one person is speaking, she cannot also listen A telephone is full duplex-information can go both ways simultaneously; both ends can talk and hear all the time-so does a modem. [Read more…] about What is half duplex?

EtherTalk is Apple Computer software that allows the Macintosh to hook into Ethernet networks. To use EtherTalk and Ethernet, the Mac must have the Ethernet interface card installed inside the computer.

 When you see a computer ad that says something like “8/80E,” the E means the computer includes the Ethernet interface card. (The numbers tell you how many megabytes of RAM and hard disk space.)

From the early 1900s until now, long distance communication has primarily been in the form of the telephone line. Now telephone lines are being used for more than the transmission of voice; they are also used for the transmission of computer data. There are many reasons why someone might want to transfer data between one PC and another using phone lines. [Read more…] about What is Communications?

Broadband ISDN (BISON) The next-generation of ISDN technology, with promised bandwidths from 150 megabits per second upward, sufficient to carry video-phone calls and movies. BISON will be carried over FIBRE-OPTIC cabling rather than wire, and the underlying transport protocol will be ASYNCHRONOUS TRANSFER MODE. Different implementations are planned in the USA, which will employ YNCHRONOUS OPTICAL NETWORK and Europe, which will use SYNCHRONOUS DIGITAL HIERARCHY.